rust/src/test/compile-fail/associated-const-dead-code.rs

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![feature(associated_consts)]
#![deny(dead_code)]

struct MyFoo;

impl MyFoo {
    const BAR: u32 = 1;
    //~^ ERROR associated const is never used: `BAR`
}

fn main() {
    let _: MyFoo = MyFoo;
}